This is a Plasma theme currently under development.
Basically it's a KDE4 port of "Breeze", the official artwork for Plasma5,
with no transparencies and sightly different colors.REMEMBER
: This is just a beta, there's still to fix the wifi icons,
krunner, and to draw a proper shutdown dialog (the current one is stolen
I'll post the icon and window themes later.
All credits to the KDE Visual Design Group for the original theme.